Improvement in hatches for hoisting-machines



R. H. MARTIN-8L c. R. ons.

vImprovement in Hatches for Hoisting-Machines. N0. Patented 0 ct.1,1872.

IM'IIIWUTIIURRIPIIIE MMX/OSBBRNZS FfiuglSS) UNI ED STATES PATENT Curran.

ROBERT H. MARTIN, OF BROOKLYN, AND CHARLES R. OTIS, OF YONKERS,

NEW YORK.

IMPROVEMENT IN HATCHES FOR HOlSTlNG-MACHINES.

Specification forming part of Letters Patent No. 131,888, dated October1, 1872.

. .Toall whom it may concern:

hoistway, with cab, and our improvement in.

hatches as applied thereto; Fig. 2 is a sectional side view of the same,showing the cab in position for passage in an upward direction through ahatch; Fig. 3, a similar view, showing the cab as commencing its descenttherethrough; and Fig. 4 is a sectional plan.

Similar letters of reference .indicate corresponding parts.

This invention relates to safety-hatches for hoisting-machines, in whichthe hatches are automatically opened and closed as the cab passes up anddown through or past them;

a and the improvement consists in a novel arrangement of hinged hatchesor lids-relatively to the floor they belong towhereby,

both when opened and closed, they form no 0bstruction above theuppersurface of said floor to interfere with the loading and unloading of thecab. The improvement also consists in various novel means orcombinations of means for automatically opening and closing the hatchesas the cab passes through them, whereby a direct action and greatsimplicity are attained.

In the accompanying drawing, A A represent the guide-posts of ahoistway, and Ba cab, arranged to travelvup and down therein. 0 is ahatch, in or of a floor, D, through which the cab B is free to passaccordingly as lifting force is applied to or removed from thehoisting-rope E. -.The hatch 0 is com posed of a well fitted withlower-hinged doors or lids b b, having their hinges on fulcrums onopposite sides of the well. Said lids are free to open both up and down,ac-

cordingly as the cab makes its ascent or descent through the hatch; andthe well of the latter is of such a depth that when the lids b b areraised, they present no obstruction above the surface of the floor tointer fere with the loading'and unloading of the cab, and so-that whenthe lids b b are closed .they prevent any through draft up the hoistwayin case of a fire, and form a safeguard against persons or bodiesfalling theredown. To this end they may be locked, when closed, bylevercatches c c, suspended from intermediate fulcrums on one or bothsides of the well, and acted upon by springs d d, to keep said levers inlock with the lids, and in proper position for upper and lowerreleasingknobs or projections e e and f f, attached to the cab, to rubagainst or over the inside edges of the levers c c, as the cab commencesits ascent or descent ,through the hatch,'

and, by moving said levers, operating to release the lids b, so thatopeners g g, formed of inclines, projections, or springs, on the top andbottom of the cab, are free to act upon the lids b b, to open them asrequired.

Springs or weights h h, are arranged or ap plied in such manner to thelids b b as to effect the closing of them when the cab is clear of thehatch.

By this system or combination of direct means for automatically openingand closing the hatches of a hoistway, all complicated arrangementsofcords and pulleys for the purpose are avoided, and great simplicitygener--= ally is attained.

What ishere claimed, and desired to be secured by Letters Patent, is-

1. The hatch 0, formed of a well provided with hinged lids or doors,arranged to open both upwardly and downwardly within or below the wellin the floor, and made self -closing by springs or weights,substantially as specified.

2. The combination of the lever-catches c c with the hatch-lids or doorsb b, arranged for operation within the well of the hatch, essentially asdescribed.

3. The combination of the releasing-knobs or projections e e and f f,with the lever-catches c c and hatch-lids or doors I) b, substantiallyas specified.

4. The combination of the lid-openers g 9, attached to the top andbottom of the cab,

the catch-levers 0 c, the lids or doors b b, and the releasing-knobs orprojections e c and f f, essentially as described.

ROBT. H. MARTIN. CHAS. R. OTIS.

Witnesses JAS. HENDERSON, GEORGE E. FILLIS.

